We will see his origin and I bet it will be completely based on this comic book or at least I hope they do. It's a good origin story (as origin stories go) and I actually have this comic book in my vast collection. This was what it meant to be a black character in the 70s from Marvel but the concept stands the test of time if this series is any indication. His powers are also easy to understand - he is basically indestructible and has super strength. They describe his skin in the comics as 'steel hard'. I wonder if he can still feel the sensation of touch?
Mike Colter is very good as Luke Cage who originally rejects the idea of using his powers to help others. He is bitter about being experimented on against his will and looks at his abilities as more of a burden than a gift. But that all changes of course or we wouldn't have us a story. It's basically a street level vigilante tale where one good man fights the gangsters and the system for those who can't fight for themselves.